摘要
采用微波水热法快速合成Zn_2GeO_4纳米带,研究反应温度、模板剂、原料用量等因素对晶体生长的影响,并优化其合成条件.用场发射扫描电镜(FE-SEM)、X射线衍射(XRD)光谱和紫外-可见漫反射吸收光谱(UVVis RDS)等手段分析产物的形貌、结构和组成,考察合成的Zn_2GeO_4在甲基橙光催化降解反应中的性能.研究结果表明:微波水热条件下,以摩尔比为2:1的乙酸锌和氧化锗为原料,在160°C反应20 min可合成分散均匀的Zn_2GeO_4纳米带,宽约100 nm,长为几十微米.与常规水热法相比,微波水热法合成的Zn_2GeO_4纳米带的本征缺陷减少,光致发光(PL)光谱降低,比表面积增大50.7%,光催化活性提高54.7%.
Zn2GeO4 nanoribbons were synthesized via a microwave-hydrothermal method. The effects of reaction factors, such as reaction temperature, amount of reactants and template, were investigated and optimized for the formation of Zn2GeO4 nanoribbons. The products were characterized by various techniques including field emission scanning electron microscopy （FE-SEM）, X-ray diffraction （XRD）, and ultraviolet-visible diffuse reflectance spectroscopy （UV-Vis DRS）. Photocatalytic activities of the synthesized Zn2GeO4 nanostructures were evaluated for the degradation of aqueous methyl orange. Experimental results indicated that Zn2GeO4 nanoribbons can be synthesized from Zn（CH3COO）2 and GeO2 （molar ratio 2： 1） under microwave irradiation at 160℃ for 20 min. The nanoribbons have uniformsizes with widths of 100 nm and are tens of micrometers in length. Compared with conventional hydrothermal methods, Zn2GeO4 nanoribbons from microwave-hydrothermal synthesis have less native defects, lower PL spectra, 50.7% larger specific surface area, and 54.7% higher photocatalytic activity.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2013年第9期2062-2068,共7页
Acta Physico-Chimica Sinica
基金
国家自然科学基金(21106006)资助项目~~
